Note: DC + 3.3V is used in R558S power supply design. Power input is not allowed until the R558S is connected. If the cable is plugged or unplugged with hot plug, electronic components may be damaged. Ensure power is cut off during cable plugging. Poor power connection, excessively short power-off/on intervals, or large voltage drop pulses may cause unstable or abnormal operation. Maintain stable power input. After turning off the power input, wait at least 2 seconds before reapplying power. Specifications: Image pixels: 112 × 88 Resolution: 508 dpi Sensor wear resistance: >200,000 cycles Storage capacity: 100 fingerprints Matching mode: 1:1, 1:N Self-learning capability: Yes Indicator lights: Colorful LED Fingerprint image capture time: <180 ms Algorithm search time: <100 ms (at 50 templates) Overall recognition time: <0.6 s (for 50 templates) Startup time: <50 ms False Acceptance Rate (FAR): <0.001% False Rejection Rate (FRR): <1% Communication interface: UART (3.3V) UART baud rate: 57600 (default) Supply voltage: 3.3 ± 0.3 V Maximum operating current: <40 mA (VDD) Shutdown current: <12 µA (VDD) Operating temperature: -30°C to 70°C Storage temperature: -40°C to 85°C Relative humidity: 20%–85% (non-condensing) ESD protection: Contact discharge ±8 kV; Air discharge ±15 kV Vibration resistance: 10–150 Hz, 0.5G, 3-axis, 1 min/octave, 1 cycle per axis Drop resistance: Withstands 1.2-meter drop onto concrete IP rating: Front-side IP54 Color: Photo color Material: Plastic Package Contents: 1 × Fingerprint Module 1 × Cable